Setting-up a MySQL Database in Plesk 
When you first log into Plesk, you will see this screen. Click the [DATABASES] button to begin setting up your database:

Note:
If the [DATABASES] button is greyed out, it means that your account does not have MySQL database access. Please contact your host to correct this.
This will bring you to the database create screen. Enter the name you want for your database and click the [ADD] button.

Now you must create your database user. Enter the database username you want and click the [ADD] button.

Now you must create a password for the database username. Enter it in the first blank, reenter it in the second blank for confirmation and click the [UPDATE] button:

You have now created your database and will be redirected to this screen:

The database name, username and password you created here are what you input into your config.php file.
User Contributed Notes: Setting-up a MySQL Database in Plesk Add a Comment